// ============================================================================
//
// Copyright (C) 2006-2007 Dengues
//
// Google Group: http://groups.google.com/group/dengues
// QQ Group: 24885404
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// ============================================================================
package org.dengues.designer.ui.database.commands;

import org.dengues.designer.ui.editors.AbstractGEFCommand;
import org.dengues.designer.ui.i18n.Messages;
import org.dengues.model.database.DBNote;
import org.dengues.model.database.DatabaseDiagram;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.requests.CreateRequest;

/**
 * Qiang.Zhang.Adolf@gmail.com class global comment. Detailled comment <br/>
 * 
 * $Id: Dengues.epf 1 2006-09-29 17:06:40Z qiang.zhang $
 * 
 */
public class DBNoteCreateCommand extends AbstractGEFCommand {

    private final DatabaseDiagram diagram;

    private final Dimension size;

    private final Point location;

    private final DBNote newNote;

    private boolean dbNoteAdded;

    /**
     * Qiang.Zhang.Adolf@gmail.com DBNoteCreateCommand constructor comment.
     * 
     * @param diagram
     * @param request
     */
    public DBNoteCreateCommand(DatabaseDiagram diagram, CreateRequest request) {
        if (diagram == null || request == null || !(request.getNewObject() instanceof DBNote)) {
            throw new IllegalArgumentException();
        }
        this.diagram = diagram;
        size = request.getSize();
        location = request.getLocation();
        newNote = (DBNote) request.getNewObject();
        setLabel(Messages.getString("DBNoteCreateCommand.Label")); //$NON-NLS-1$
    }

    /**
     * Qiang.Zhang.Adolf@gmail.com DBNoteCreateCommand constructor comment.
     * 
     * @param diagram
     * @param rectangle
     * @param note
     */
    public DBNoteCreateCommand(DatabaseDiagram diagram, Rectangle rectangle, DBNote note) {
        this.diagram = diagram;
        size = rectangle.getSize();
        location = rectangle.getLocation();
        newNote = note;
        setLabel(Messages.getString("DBNoteCreateCommand.Label")); //$NON-NLS-1$
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.commands.Command#execute()
     */
    @Override
    public void execute() {
        if (size == null) {
            newNote.setHeight(80);
            newNote.setWidth(180);
        } else {
            newNote.setHeight(size.height);
            newNote.setWidth(size.width);
        }
        newNote.setX(location.x);
        newNote.setY(location.y);
        newNote.setOpaque(true);
        newNote.setText(Messages.getString("DBNoteCreateCommand.defalutText")); //$NON-NLS-1$
        dbNoteAdded = diagram.getDbChildren().add(newNote);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.commands.Command#undo()
     */
    @Override
    public void undo() {
        diagram.getDbChildren().remove(newNote);
    }

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.gef.commands.Command#canUndo()
     */
    @Override
    public boolean canUndo() {
        return dbNoteAdded;
    }
}
